description coupling pin for scaffolding this coupling pin has an outside diameter of 1 3/8 in. it is made of steel and has no collar. a spring retainer is required for installment and are sold seperately. california proposition 65 warning. features 1 3/8 in. outside diameter 6 in. tall spring retainer required for easy installment. does not have a colar specifications acme tools brand name acme tools shop acme tools part number scp-wa assembled weight (lbs) 1 california proposition 65 warning required yes globaltradeitemnumber (gtin) 00837654766224 internet product code (ipc) 75657b3d7fc ladder accessory category scaffolding length (in) 6 package weight 1 package weight (lbs) 1 scaffolding type scaffold accessories upc 837654766224 width (in) 2