The black rubber Standard Sling fits most guns with a 32"to 38" shaft, but especially our JBL 4W44 gun.
The 614 sling has a 1/2 inch diameter and is an 14 inches in length.
Fits JBL: D6, 4D33, 4D38, 4D20. Also Aquacraft G-10, G11, G17. Scubapro 33-026 Dacor WE 24. Arbalete AR428, AR 414, AR 415