RGSL-5 Royall Royall tapered real glass bottle neck guitar slide GRS-SC The Rock Slide moulded glass slide size S (inside 17.5 - length 48.5mm) GRS-MC The Rock Slide moulded glass slide size M (inside 19.5 - length 60.0mm) GRS-LC The Rock Slide moulded glass slide size L (inside 21.0 - length 63.0mm) GRS-XLC The Rock Slide moulded glass slide size XL (inside 22.5 - length 66.0mm) BBN-2030-P Boston pyrex glass slide BBN-2065-P Boston pyrex glass slide DL-202 Dunlop glass slide DL-203 Dunlop glass slide DL-204 Dunlop glass slide DL-210 Dunlop glass slide DL-211 Dunlop glass slide DL-212 Dunlop glass slide DL-213 Dunlop glass slide DL-215 Dunlop glass slide DL-218 Dunlop glass slide FGS2 Fender glass slide FGS3 Fender glass slide FGS5 Fender glass slide