This Hollis HTS 2 Double System is a great unit.
This is a sophisticated but easy to use unit used mostly by serious divers.
With many special features included in the system, they include
1x HTS 2 Harness (HL208.1202.00x)
1x C45 Wing (HL208.1253)
1x Stabiliser Plates - Pair (HL208.1298)
1x 7.25 inch Twin Band & Bolt Kit (HL208.1077)