HomeAcousticCeilingVersionsVERSION A VERSION A These have longitudinal grooves, 3mm wide, machined along the length of the panel. Version A has slots machined at every 32mm resulting in each slat being 29mm wide. Category: Versions Product ID: 18345 Related products Add to WishlistRemove from Wishlist Add to Wishlist VERSION C & D Read more Add to WishlistRemove from Wishlist Add to Wishlist VERSION B Read more