Slackers Slack Rack 5yrs+Grand your own 100x100mm wood beam and add the Slack Rack and you have a portable slackline Create a fun outdoor play space, or indoor fitness area with portable stylish slackrack. No trees Needed! Low set up height 1' is good for ages 5+ to adults, WHEN TO USE: at party or events, schools gyms, backyard. Don't have a large enough outdoor space for a slackline? Want to take your slackline to the beach, park, or a friend's house? Then this Slackers