For years, pulleys ori Furlex Worn out and more brakes as a roller Wat ne relief when rolling in and out, the rest are also replaced Bit fiddly to install because bolts fit (short) but with a narrow gangway and little freedom of movement can sometimes motherboard go overboard, otherwise great, wat'n appel 'SPRENGER'
I bought the Sprenger block to replace the Pfeiffer block. The Pfeiffer block has loosened from the fastening clamp several times and then the clamp had to be reassembled. The assembly is a bit fiddly. The Pfeifer block is therefore not well rated and too expensive. The sprinkler block is much better quality and well worth the money. Easy assembly, good hold on the 25mm tube and can be rotated in all directions.