Check the listing for details. RAM-231Z-2U RAM ATV/UTV Rail Ball Base.... Color: Black, Condition: New. Listed at 38.94 USD. RAM ATV/UTV Rail Ball Base... RAM-231Z-2U Genuine RAM Products! Designed for a clean installation, RAM-231Z-2U base accommodates most common tubing sizes on UTV's and ATV's, allowing for the placement of the RAM rubber ball base. Safely concealing a strap clamp in a compact housing, you won't have to worry about exposed sharp edges or unwanted loosening. Included in the kit is a zinc coated metal u-bolt, this allowing you to modify the mount to accommodate mounting location. The base also includes black cover caps to be placed over the exposed ends of the u-bolt.hardware included (1) Strap Clamp Adapter(2) 1/4 INCHES -20 x 1 INCHES Machine Screws(2) 1/4 INCHES -20 Nylock Nuts(1) Zinc Worm Drive Strap Clamp(1) 6 INCHES Rubber Strip(1) 1/4 INCHES -20 U-Bolt for .5 INCHES - 1 INCHES Rails(1) 1/4 INCHES -20 U-Bolt for 1 INCHES - 1.25 INCHES Rails(2) Rubber Caps(1) U-Bolt Spacerclamp range U-Bolt: .5 INCHES - 1.25 INCHES diameterStrap Clamp: 1.57 INCHES - 3.15 INCHES diameterball size C Size (1.5 INCHES )weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 0.45 lb hardware included (1) Strap Clamp Adapter(2) 1/4 INCHES -20 x 1 INCHES Machine Screws(2) 1/4 INCHES -20 Nylock Nuts(1) Zinc Worm Drive Strap Clamp(1) 6 INCHES Rubber Strip(1) 1/4 INCHES -20 U-Bolt for .5 INCHES - 1 INCHES Rails(1) 1/4 INCHES -20 U-Bolt for 1 INCHES - 1.25 INCHES Rails(2) Rubber Caps(1) U-Bolt Spacer clamp range U-Bolt: .5 INCHES - 1.25 INCHES diameterStrap Clamp: 1.57 INCHES - 3.15 INCHES diameter ball size C Size (1.5 INCHES ) weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbs materials Marine-grade aluminum packaging type Poly Bag Weight 0.45 lb