This is a pack of ten 5x10x4mm rubber sealed ""Speed"" 1/8 clutch bearings. ProTek R/C ""Speed"" bearings are high quality steel/chrome bearings designed for the R/C racing enthusiast. These 5x10x4mm rubber sealed bearings are the standard bearing for the 1/8th scale nitro clutches. Some racers prefer the rubber sealed bearings for better protection against dirt for their clutch. Please check the manual that came with your vehicle for the correct size if you are not certain. These are also used as wheel bearings in the Kyosho Lazer ZX-5 1/10th scale 4WD electric buggy. ARC R10 Agama A215 Agama A215 SV Agama A215E Arrma Fury Arrma Granite Original Axial RR10 Bomber 1.0 Axial RR10 Bomber 2.0 Axial SCX10 I Axial SCX10 II Axial SCX10 III Axial Wraith 2.2 Axial Yeti 1/10 Axial Yeti SCORE CEN GST 7.7 Caster S10B Caster S10B RTR HB Racing D216 HB Racing D817 V2 HB Racing D817T HB Racing Lightning Pro 2 HB Racing Lightning Stadium Pro HB Racing Pro 5 HB Racing R10 HB Racing TCX HB Racing TCXX HPI Savage Original HPI Venture HoBao Hyper 7 TQ HoBao Hyper SS Kyosho Inferno MP7.5 Kyosho Inferno MP777 Kyosho Lazer ZX-5 Kyosho MP10 Kyosho MP9 Kyosho MP9 TKI2 Kyosho MP9 TKI3 Kyosho MP9 TKI4 Kyosho MP9e Evo Kyosho MP9e TKI4 Kyosho ST-R Kyosho ST-RR Kyosho ST-RR EVO Kyosho ST-RR EVO.2 Kyosho Scorpion XXL Kyosho Ultima DB Kyosho Ultima RB5 Kyosho Ultima RB6 Kyosho Ultima RT5 Kyosho Ultima SC Kyosho V-One R4 Losi 22 1.0 Losi 22 2.0 Losi 22 3.0 Losi 22 3.0 SPEC-Racer Losi 22SCT 1.0 Losi 22SCT 3.0 Losi 810 Losi 8IGHT-E 4.0 Losi 8IGHT-T 4.0 Losi 8IGHT-T E 3.0 Losi 8IGHT-X Losi 8IGHT-XE Race Losi LST Original Losi LST2 Losi TEN-SCTE Losi TEN-SCTE 2.0 Losi TEN-T Losi XXX-SCB Losi XXX-SCT MST CFX MST CFX-W MST CMX Mugen MBX5 Original Mugen MBX5R Mugen MBX5T Mugen MBX6 Original Mugen MBX6R Mugen MBX6T Mugen MBX7 Original Mugen MBX7R Mugen MBX8 ECO Mugen MBX8 Original Mugen MBX8T Original Mugen MBX8TE Mugen MGT7 Original Mugen MGT7E Mugen MRX5 WC OFNA Hyper 7 TQ OFNA Hyper SS OFNA Jammin X1-CR OFNA Jammin X1-CRT RB Products RB One RB Products RB One R Racers Edge Pro2 SC Redcat Gen8 Redcat Shredder SC Redcat Shredder XB S-Workz S35-2E S-Workz S350 BE1 S-Workz S350 BK1 S-Workz S350 BX1 SSD Trail King Schumacher CAT K1 Schumacher Mi1 Schumacher Mi5 Pro Serpent 747 Serpent 966 Serpent S811 Cobra Serpent S811 Cobra GT Serpent S811 Cobra T Serpent Spyder SRX-2 MH Serpent Spyder SRX-4 Sportwerks Mayhem Team Associated Apex2 Team Associated RC10 B5 Original Team Associated RC10 B5M Team Associated RC10 B5M Factory Lite Team Associated RC10 B64D Team Associated RC10 B74 Original Team Associated RC10 B74.1 Team Associated RC10 B74.1D Team Associated RC10 F6 Team Associated RC10 SC5M Team Associated RC10 SC6.1 Team Associated RC10 T5M Team Associated RC10 T6.1 Team Associated RC10B6 Original Team Associated RC10B6.1 Team Associated RC10B6.1D Team Associated RC10B6.2 Team Associated RC10B6.2D Team Associated RC10B6.3 Team Associated RC10B6.3D Team Associated RC10B6.4D Team Associated RC10B6D Team Associated RC8B3 Team Associated RC8B3.2 Team Associated RC8B3.2e Team Associated RC8B3e Team Associated RC8T3 Team Associated RC8T3e Team Associated TC7 Original Team Associated TC7.1 Team Durango DETC410 V2 Team Durango DEX210F Team Durango DEX410 V5 Team Magic E4RSII Touring Car Team Magic E6 Trooper Team Magic G4D Touring (Drift Spec) Team Magic G4JR Touring Car Thunder Tiger EB4 S3 Thunder Tiger ST-1 Traxxas TRX-4 Traxxas TRX-4 Vaterra Glamis Uno Vaterra Twin Hammers Vaterra V100S Vetta Karoo XRAY NT1 Original XRAY T2 008 XRAY T2 009 XRAY T2 Original XRAY T2R Pro XRAY T4 2016 XRAY T4 2017 XRAY T4 Original XRAY XB2 Original XRAY XB4 2016 XRAY XB4 Original XRAY XB8 Original XRAY XT2 Original Yokomo B-MAX2 MR Yokomo B-MAX2 MR V2 Yokomo B-MAX2 Original Yokomo B-MAX4 II Yokomo B-MAX4 III Yokomo BD7 2016 Yokomo BD7 Original Yokomo BD8 2017 Yokomo Formula 001 Yokomo YZ-2 CA Yokomo YZ-2 CAL2 Yokomo YZ-2 CAL3 Yokomo YZ-2 DT Yokomo YZ-2 DTM Yokomo YZ-2 DTM2 Yokomo YZ-2 DTM3 Yokomo YZ-2 Original Yokomo YZ-2 T Yokomo YZ-4 Original Yokomo YZ-4 SF (PTK-10040)